Crusher.



R. BERNHARD.

CRUSHER.

PL|cAT|oN FILED SEPT. 5. m4.

Patented Feb. 12, 1918.

2 SHEETS-SHEET 2 @Mw/gA fltitiorvrvegz R. BERNHARD.

CRUSHEH,

APPLICATION Flu-:D SEPT. 5. 1914.

Patented Feb.12,1918.

2 SHEETS-SHEET I.

Invevofor;

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ing, forming a part UNITED sTATEs PATENT oEErcE.

RICHARD BERNHARD, 0F MILWAUKEE, WISCONSIN, ASSIGNOR, BY

MENTS, TO WORTHINGTON PUMP AND MACHINERY CORPORATION,

N. Y., A CORPORATION OF VIRGINIA.

MESNE ASSIGN- OF NEW YORK,

CRUSHER.

Specification of Letters Patent.

Patented Feb. 12, 1918.

Application filed September 5, 1914. Serial No. 860,325.

State of Wisconsin, have invented certain new and useful Improvements inCrushers,

of which the following is a specification, ref-l erence being had to theaccompanying drawthereof.

This invention relates to crushers for rocks and minerals and theobjects of the invention are to improve jaw crushers in the manner to behereinafter described and claimed.y

Referring to the drawings which accompany this specification and form apart hereof, on which drawings the same reference characters are used todesignate the saine parts wherever they may appear in each of theseveral views, and which drawings illustrate an embodiment of thisinvention, F-igure 1 is a vertical longitudinal section of part of acrusher; Fig. 2 is a horizontal section taken on the line a---a on Fig.3, looking in the direction indicated by the arrows; Fig. 3 is avertical, transverse section of a part of the Crusher taken on the lineb-b on Fig. 1, looking in the direction indicated by the arrows; andFig. 4 is a vertical, longitudinal section of the lower part of thepitman.

Referring to the drawings, the reference numeral 1 desi nates the frameof the crusher, provide with the stationary jaw 2, the movable jaw 3,the movable jaw shaft 4, the pitman 5, the pitman eccentric shaft 6, andthe toggles 7 and 8, which may be of any ordinary or preferredconstruction. Means are provided to balance the pitman and toggles andto vary themotion of the movable jaw as follows: In Crushers of largesize the friction due to the weight of the pitman and toggles is aserious power loss. This friction develops in two places, viz: on theitman eccentric shaft itself primarily an is then transferred to thebearings of this eccentric shaft on the frame. To balance, orcounterhalance, the pitman and the toggles' the pitman is supported byspring pressure applied below the pitman.

' its pin 12,

able means.

The pitman is provided with seats 10 for supporting springs 11 whichpreferably rest upon the heads of alinement pins 12 which are adjustablysupported bythe saddle 9. Preferably, the saddle 9 is yprovided withscrewthreaded apertures 13 of sufficient size to permit of the removalof a spring 11 and and screwthreaded plugs 14 screwed into the apertures13 support the springs 11 and the pins 12. This construction enables aspring to be removed and replaced by another, if necessary. By placingthe counterbalancing springs below, or under, the pitman, they are outof the way and are locatedwhere the least movement of the pitman towardand away from the stationary jaw 2 occurs so that they are not thrownseriously out of a vertical plane. The upper ends of the plugs 14 areprovided with rounded projections'l to engage in recesses 16 in theheads of the pins 12 to allow for the slight movements toward and awayfrom the stationary jaw 2 without bending the springs.

Simple, strong and efficient means are provided for varying the strokeof the movable jaw 3.so that the crusher can be adjusted to crush thematerial according to its physical characteristics of hardness, softnessor elasticity and according to the size of the discharge opening betweenthe jaws. The reference numerals 17, 18, 19 and 20 designate knuckleplates provided with rounded recesses ito receive the rounded knuckleends of the toggles 7 and 8. These knuckle plates are provided withdove-tailed, or V-shaped, edges to seat in undercut dovetailed, orV-shaped bearings in theA directions to resist the stresses and may beheld in position by set screws or any other suit- The knuckle plates 18and 19 which are secured to the pitman are the ones i which it ispreferred to use for adjustment purposes and they are each provided witha lurality of recesses, two recesses 21 and 22 being shown in knuckleplate 18 and two recesses 23 and 24 being shown in knuckle plate 19 tofully explain the principle involved. Referring to Fig. 1 of thedrawings', it will be readily apparent that by dropping the ends of thetoggles 7 and 8 from recesses 21 and 23 into recesses 22 and 'Both edges25 and 26 and knuckle plates 18 and 19 are made alike, that is to say,both edges of these lmuckle 24 the extent of movements of the movablejaw 3 will be increased. Other adjustments are provided in the followingmanner: 27 and 28' of the plates are made dovetailed, or V-shaped to fitin the bearings 29 and 30 and the recesses in each knuckle plate arelocated at dierent distances from the adjacent edges of the knuckleplate so that when a knuckle plate is reversed in its bearing therecesses will lie in diii'erent vertical ositions from what they didbefore reversa as clearly shown by Fig. @t of the drawings.. l

The reference numerals 31 and 32 desig nate the customary draw-back rodsoperated by springs 33, only one of which is shown by the drawings.

What is claimed is:

1. The combination with the pitman in a crusher of springcounterbalancing means located below the pitman to support the pitmanand take the weight thereof from its bearing..

2. The combination with the pitman in a crusher of' counterbalancingsprings' placed below the pitman to support it, and means to adjust thetension of said springs.

3. The combination with a Crusher provided with a pitman, of a saddlelocated below said pitman, springs for supporting the :retenes pitman,and adjustable means carried by said saddle for supporting said springs.

4. 'llhe combination with a Crusher prose vided lwith a pitman, of asaddle located below said pitman, springs for supporting the pitman,pins and plugs, the saddle being provided with apertures for said plugsof a vsize large enough for the removal of the springs therethrough,substantially as described.

5. The combination with a crusher provided with bearings for the edgesof knuckle plates, of reversible knuckle plates having their oppositeedges adapted to iit saidvbearings and provided with recesses for theknuckleof a toggle located at diiferent distances from the adjacentedges of the knuckle plates.

6. A knuckle plate for Crushers provided with similarly shaped edges sothat either edge is adapted to seat in the same bearing andprovided-With recesses adapted to receivethe knuckle of a toggle locatedat different distances from the adjacent edges of the lmuckle plate.

llnv Witness whereof ll hereto atix my signature in presence of twowitnesses.

un BERNHARD'.

Witnesses:

JOHN H. Hunter, FRANK E.. BENNETT.

